Method of preparing heel blanks



May 29, 1928. 1,671,156

R. S. MEGATHLIN METHOD OF PREPARING HEEL BLANKS Original Filed May 5, 22

" operations could Patented May 29, 1928.

UNITED STATES PATENT OFF-ICE.

RALPi s. MEGATHLIN, or QUINCY, MASSACHUSETTS, ASSIGNOR To UNITED SHOE MAGI-IINERY CORPORATION, OF PATERSON, NEW JERSEY, A CORPORATION on NEW JERSEY.

Application filed May 5, 1922, Serial No. 558,684.

This invention relates to the preparation of heel blanks, and is illustrated as utilized in fitting low blanks for rubber heel bases by gouging and deepening the gouge at the breast end to form a scallop which is known in the art a blended Coburn lip.

' Until recently it has been necessary to prepare heel blanks, by assembling and securing together a plurality of lifts, forming a gouge on .the seat surface of each blank and deepening it at the heel breast end to form a Ooburn lip, by two separate Operations. It has recently been suggested that the two machine, shown'ascompr-ising a cutter and a turret carrying a plurality of heelholders, each controlled by a cam to force a heel blanktherein toward the cutter near the end of the gouging cut to deepenthe gouge to form-a's'callo'p fitting overtlie shank part of the shoe, forming the desired blended lip or blended Cobnrn lip. This machine is shown in United States Letters Patent NO. 1,396,143,. granted Nov. 8,1921, on application of Joseph H. Pope, now Reissue No.'15,4c l8. l

The present invention relates to a method of preparing heel blanks which. is different I from that employed when the patented machine is used and which is especially well adapted for preparing certain kinds of heel blanks such as the low rubber-heel bases now used in most inens .and in many womens shoes. According to the present invention, a plurality of lifts are assembled and secured together to form a comparatively thin asse m bled blank such as a rubber-heel base; and then the blank is distorted andthat portion which projects beyond .a fixed plane :is removed in such manner as if) form a gouge throughout the major portion of the blank and a blended scallop at the extreme breast end. In order to facilitate the distorting operation, one of the lifts of the assembled blank preferably has a cut-away middle portion so that the blank is considerably th'n ner at its middle than at its other localities and is thereby more readily distorted than would Otherwise be the case. This method is also of advantage in saving stock, since the lifts having cut-away middle portions may, if desired, be made horse-shoe shaped out the seat surface of each blank be performed ina single METHOD OF PREPARING HEEL BLANKS.

ene'wed. October 18,1926.

blank;

Fig.2 is a side elevation of the,work-en-' gaging parts of the co-operatingrolls;

Fig. .3 is a section, partly broken away, through the rolls, on an enlarged scale;

Figs. 4, 5 and 6 are views -slmwing the successive steps of preparing a heel blank according to my novel method; and

Fig. 7 is longitudinal section of a heel blank as soprepare'd.

As shown in Fig. 1, the-general organ zer tion of" the machine comprises .co-operating heel blank feeding and distorting rolls 1d and 12, a stationary knife 14 to skive the waste material from heel blanks distorted thereby, and mechanism automatically to present heel blanks successively thereto.

The heel blanks are stacked on a stationary table 16 in a magazine 18, under a presser 20, and are advanced successively to the rolls by a pusher 22-re'cipr0cating over the table. Parts not hereinafter fully described may be, and are shown as being, the same as those described in United States Letters Patent No. 961,736, granted June 11. 191(1), on application of J. R. cott, and No. 1,300,627, granted April 15, v1919, on application of E; E. Lane.

As shown in Fig. 2, roll 10 comprises a plurality of sections formed with teeth which sink into the waste portion of the work to a greater or less extent. To distort the blanks against the teeth of roll 10,roll 12 is formed with a cavity 24 deep enough along its front and sides to protect the sides and rear end of a heel blank, as shown at 26. An intermediate portion 28, extending from B to C, in Fig. 3, which grades into the firmly to grip the blank and carry its forward edge under knife 14;, then a, portion AB of gradually increasingradius to form the bevel 54, then a concentric portion 28 extending from B to C to form the bottom 56 of the gouge, and finally a portion 32 extending from C to D to formthe lip 58.

The portion 26 is made somewhat larger than the usual blanks, to permit use of the roll on larger blanks if desired. Although when so used the size of gouge and lip is the same as on the smaller blanks, it is often desirable thus to vary the size of the blanks without changing the treatment of them.

If this machine were used on hard blanks made in the usual way by assembling whole lifts. it will be apparent from an inspection of Fig. 2 that the operator would have to choose between providing long, slender, easily-broken teeth on roll 10, and allowing the blank to exert a tremendous pressure wedging rolls 10 and 12 apart. To obviate both difficulties I prepare the blanks according' to a novel method comprising thesteps of assembling one or more whole lifts with a lift 52 having a cut-away nniddle portion, said lift being herein shown as of horseshoe-shape, and then distorting and skiving the blank so formed, in a machine of the type illustrated, as abovedescribed. As shown in Fig. 2. this assembly is sufficiently near the desired final shape that the usual short, strong teeth maybe employed on roll 10 without any undue pressure tending to wedge rolls 10 and 12 apart.

In carrying out my invention, a number of heel blanks of the form shown in Fig. 5

are made up, each being formed by assembling one or more lifts 50, with a lift or rand 52, and theseblanks are placed in the magazine 18 under the presser 20. Thereafter pusher 22 advances the heel blanks successively to rolls 10 and 12, which cooperate with knife 14 to form 'on each heel blank a gouge 56 and an adjoining blended lip 58. i

The machine Which has been described above is not herein claimed but forms the subject-matter of divisional application Ser. No. 14,294, filed Mai-eh 9, 1925.

Having described my invention, what I claim asncw and desire to secure by Letters Patent of the United States is: v

1. That method of preparingheel blanks which comprises the steps of as'semblingand securing together a whole lift 50 and a lift 52 formed like a rand in a horseshoe shape, then progressively distorting the blank made up of the assembled lifts by forcing the central part of the blank upward against a set of feed teeth, the absence of material from the center of the horseshoe-shaped lift serving to prevent lifting the feed teeth from the sides of the blank and to prevent undue pressure on the teeth at the center of the blank, and finally removing thematerial which is forced above a fixed plane in such manner as to form a gouge and an adjacent blended scallop.

2. That method of preparing heel blanks which comprises the steps ofassembling and securing together a lift 50 and a horseshoeshaped rand 52 to form a blank, and then distorting the assembled blank and removing that part thereof which is brought above a fixed plane in such a manner as to form a gouge and an ad acent blended Coburn 11p. 3. That method of preparing heel blanks which comprises assembling and securingber-heel base, and then distorting the assem bled blank and removing that portion there of which is caused toproject beyond a fixed plane in such manner as to form a gouge throughout the major portion of the blank anal a blended scallop at the extreme breast en l i In testimony whereof I have signed my name to this specification.

RALPH S. MEGATHLIN. 

